Folding machine



s. DALTON FOLDING MACHINE Filed Dec. 20, 1926 155mm Z02: Raymond di ymmmWW Y AZZarn:y s.

Patented Nov. 29,1927.

UNITED STATES P-ATENT OFFICE.

RAYMOND s. Damon, or cnnvnmuvn,

OHIO, ASSIGNOB TO THE CLEVELAND FOLDING FOLDING MACHINE.

Application filed December 20, 1926. Serial No. 155,839.

This invention relates to feeding rolls for aper handling machines andespecially to I ceding rolls or use in paper folding machines.

Heretofore it has beencustomary 'to use fluted or nurled rolls in whichthe grooves and ridges in the surface of the rolls were parallel tothe-axes. One example of such construction is shown'in the CampbellPatent No. 1,589,584, granted June 22, 1926.

It is one of the objects of the present invention to provide an improvedform of nurled feeding rolls that will: be adaptedto positively gri thesheets of paper at points throug outthe length of the rolls so as to{avoid any possibility of creasing or soiling: the paper. and to insureaccurate alignment of the sheets. I

' I It is a further object'of the invention to 2 provide an improvedform of feeding rolls that will accomplish the above stated; objectswithoutbeing more costly to manufacture.

Other objects of the invention and the features of novelty will beapparent from the following description, taken in connection with the'acco'm anying drawings, of which: Y

Fig. 1 is an e'vation of a pair of feeding rolls embodying my invention;

Fi 2 isa transverse section thereof on I the lme 2-2 of Fig. 1 and Fig.3 is a diagramillustrating the principles' of my invention.

Referring to the drawin 10 and Hindieats 'apair of feeding ro and, forclearness,:ythe space 12, exaggerated, it be understood thatfthis spacewill be restric in accordance with the thickness ofthe sheet, whetherfolded'or unfolded. The rolls 10 and 11 are provided with flutes 0rnurls 4. which extend spirally, as shown at 13, and

these flutes or nurls ma ing to the method described in the aforesaidPatent No. 1,589,584, or otherwise as desired.- l'e ofthe flutes ornurls 13 isfvari-j in practice, I have found that at The an 46-81319 aniral which. advances circumferential! o t e roll about of an inch in a36 inches 4 a direction 0 the spirals is immaterial, that 50 is they maybe either right-hand or lefthand spiralsQbut I prefer to make thespirals spaced be formed accord-' l o 'ves satisfactoryresults."-'=31he.

my signature.

of both rolls alike. In other words, I prefer to make the spirals ofboth rolls either right-hand or left-hand so that, on the meet ing orcooperating sides of the rolls, the flutes or nurls will extend atrelatively opposite angles to the plane of the roll axes and thus crossor intersect, as illustrated in Fig. 3.

Fig. 3 may be considered as an exa gerated development,diagrammatically, o the flutes or nurls at the space 12, the flutes ornurls of the roll 10 being indicated b the full lines 14 and those ofthe roll 11 heing indicated by the broken lines 15. The plane of theroll axes is indicated at 16 and it will be noted that certain of thelines 14 and 15 intersect at the points 17. \7 As the rolls revolve,assuming that the movement is in the direction of the arrow in Fig.3,other intersections, such as indicated at 18, will come times, beintersecting points at which the or is gripped. aving thus described myinvention, what I- claim is: ,1. In paper feedin apparatus, a pair ofcooperating feed r0 s having nurled surfaces on which the nurling isarranged in similar spirals so that the sheets of paper willbe'positively gripped by the cooperating sides'of the rolls at pointswhich are spaced axiallfil-of the rolls. 2." paper feedin apparatus, apair of cooperating feed ro s aving nurled surfaces on which the nurlingis arranged so that the sheets of paper willbe positivelygripped at anytime at a plurality of points Spaced axially'of the rolls. I

.3. 'In paper feeding apparatus, a pair of coo ratm feed rolls having.spirally nur ed sur aces so that the cooperating sides the rolls willpositively gri the sheets of apgrat any instant at s ace points.

' testimony whereo I hereunto aflix .mmoun s. DALTON.

